Buckle



FIG. 1 is a perspective view of the front, bottom and right side of a buckle showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof, the left side view being mirror image thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom view thereof.

The broken lines shown are included for the purpose of illustrating the unclaimed portions of the buckle and form no part of the claimed design. 

CLAIM The ornamental design for a buckle, as shown and described. 